clang/blink_gc_plugin: Replace 'WebCore' with 'blink'

tools/clang/blink_gc_plugin/tests/ignore_fields.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IGNORE_FIELDS_H_
 #define IGNORE_FIELDS_H_
 
 #include "heap/stubs.h"
 
-namespace WebCore {
+namespace blink {
 
 class HeapObject : public GarbageCollected<HeapObject> {
 public:
     virtual void trace(Visitor*) { }
 };
 
 // Don't warn about raw pointers to heap allocated objects.
 class A : public GarbageCollected<A>{
 private:
     GC_PLUGIN_IGNORE("http://crbug.com/12345")
@@ skipping 13 matching lines @@
     void trace(Visitor*);
 private:
     Member<HeapObject> m_one;
     GC_PLUGIN_IGNORE("http://crbug.com/12345")
     Member<HeapObject> m_two;
 };
 
 }
 
 #endif